Re: [Qemu-devel] [PATCH v3 1/2] bswap.h: Fix ldl_he_p() signedness

[Richard Henderson <richard.henderson@linaro.org>]

On 04/23/2018 06:25 AM, Philippe Mathieu-Daudé wrote:
> As per the "Load and Store APIs" documentation (docs/devel/loads-stores.rst),
> "No signed load operations are provided."
> Update lduw_he_p() to return as unsigned.
> 
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  include/qemu/bswap.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
> index 3f28f661b1..613978f838 100644
> --- a/include/qemu/bswap.h
> +++ b/include/qemu/bswap.h
> @@ -330,9 +330,9 @@ static inline void stw_he_p(void *ptr, uint16_t v)
>      memcpy(ptr, &v, sizeof(v));
>  }
>  
> -static inline int ldl_he_p(const void *ptr)
> +static inline uint32_t ldl_he_p(const void *ptr)
>  {
> -    int32_t r;
> +    uint32_t r;

Nack, not without auditing all users.

The documentation is clear about ldl being an oddball,
primarily because we didn't audit all users last time.

In the short term, just cast your user, which is what
we wind up doing elsewhere in the codebase.

r~